Under what circumstances does a top-down parser predict the production A −→ α? What sorts of “obvious” facts form the basis of FIRST set and FOLLOW set construction? Outline the algorithm used to...

Under what circumstances does a top-down parser predict the production A −→ α? What sorts of “obvious” facts form the basis of FIRST set and FOLLOW set construction? Outline the algorithm used to complete the construction of FIRST and FOLLOW sets. How do we know when we are done?